Add new Test for missing scheme behavior

* testenv/Makefile.am: Add Test-missing-scheme-retval.py
* testenv: New file Test-missing-scheme-retval.py

Idea and Perl implementation by Zdenek Dohnal <zdohnal@redhat.com>

testenv/Makefile.am

@@ -61,6 +61,7 @@ if HAVE_PYTHON3
     Test-Head.py                                    \
     Test--https.py                                  \
     Test--https-crl.py                              \
+    Test-missing-scheme-retval.py                   \
     Test-pinnedpubkey-der-https.py                  \
     Test-pinnedpubkey-der-no-check-https.py         \
     Test-pinnedpubkey-hash-https.py                 \

testenv/Test-missing-scheme-retval.py

@@ -0,0 +1,42 @@
+#!/usr/bin/env python3
+from sys import exit
+from test.http_test import HTTPTest
+from test.base_test import HTTP
+from misc.wget_file import WgetFile
+import os
+
+"""
+    This test ensures that Wget complains about missing scheme
+"""
+############# File Definitions ###############################################
+A_File = WgetFile ("bar", 'Content')
+
+# put the URL into 'options' to avoid prepending scheme/localhost/port
+WGET_OPTIONS = "/foo/bar"
+WGET_URLS = [[]]
+
+Files = [[A_File]]
+
+ExpectedReturnCode = 1
+ExpectedDownloadedFiles = []
+
+################ Pre and Post Test Hooks #####################################
+pre_test = {
+    "ServerFiles"       : Files,
+}
+test_options = {
+    "WgetCommands"      : WGET_OPTIONS,
+    "Urls"              : WGET_URLS
+}
+post_test = {
+    "ExpectedFiles"     : ExpectedDownloadedFiles,
+    "ExpectedRetcode"   : ExpectedReturnCode
+}
+
+err = HTTPTest (
+                pre_hook=pre_test,
+                test_params=test_options,
+                post_hook=post_test,
+).begin ()
+
+exit (err)